Feed-out device for molten glass.



PATENTED JUNE 25, 1907..

J. H. LUBB ERS. FEED-OUT DEVICE FOR MOLTEN GLASS.

APPLICATION FILED AUG. 12 1904.

2 SHEETS-SHEET 1.

WITNESSES PATENTED JUNE 25, 1907.

J. H. LUBBBRS. FEED-OUT DEVICE FOR MOLTEN GLASS.

APPLICATION FILED AUG. 12, 1904.

2 SHEETS-SHEET 2.

H ENVENTOR WITNESSES 715% M UNITED STATES PATENT OFFICE.

JOHN H. LUBBERS, OF ALLEGHENY, PENNSYLVANIA, ASSIGNOR TO WINDOW GLASS MACHINE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORA- TION OF NEW JERSEY.

Specification of Letters Patent.

Patented June 25, 1907.

Application filed August 12, 1904. Serial No. 220,486.

To all whom/ it may concern:

Be it known that I, JOHN H. LUBBERS, of

Allegheny, Allegheny county, Pennsylvanla,

have invented a new and useful Feed-Out Device for Molten Glass, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Fi ure 1 is a longitudinal vertical section showing my improved feed-out device applied to the forehearth of a glass tank furnace; Fig. 2 is a vertical cross-section on the line IIII of Fig. 1, and Fig. 3 is a detail perspective view.

My invention relates to the feeding out of molten glass from a tank or receptacle containing it, and is designed to provide a sim le and eifectivendevice of*th1s,character y which a desired quantity of glass can be withdrawn and the feed-out opening then shut off to prevent further flow.

In the drawing, 2 represents the fore- I hearth of a glass tank furnace, in which the glass lies at about the level a, a. The front .end of the forehearth is provided with an arched hole which hasa central downwardly extending slot 4, with guiding slots 5,.5 at its sides. Inthese slots rests the vertically movable gate or valve 6 which is formed of a refractoryslabofgreaterwidth than he 1 11 4, so that its edges will extend into the guiding slots 5, and preferably has a beveled or chamfered lower ed e of V-sh a e in cross-section. The lower e ge of this look when in closed position fits in a transverse notch or groove at the bottom of the slot in the dam block, and the upper end of the gate projects above the dam. This upper end portion may be provided with holes 7 at its ends to receive lever rods 8, 8 inserted through holes 9 in the side walls by which the block may be pried up or forced down into place.

From the'lower edge of the ort or slot in the dam a trough 10 leads flirwardly and downwardly to the receptacle 11 to which the glass is to be supplied. This trough may be sup orted in a cross-wall 12 through a hole in which it extends; and to prevent dripping I of the glass at the upper end of the trough either through its bottom or sides I preferably use the water-cooling pipe 13 which extends under the joint of the trough and .dam and is preferably provided with reversely bent portions 14 at the sides of the trough as shown in Fig. 2. Water is circulated through this pipe to cool the joint, so that any glass seeking to dro through the joint will be chilled and thus orm a chilled lass seal to prevent escape of the flowing moIten glass.

' I11 order to cut off the heat of the forehearth from the pan or'receptacle receiving the glass, I preferably rovide a vertically movable refractory ba e'or valve 15 which slides over thecross-wall and fits ulpon the lower endportion of the trough. he hole through the cross-wall is thus cut off from the pan or receptacle, and the heat of the forehearth is shut ofi In order to give access to the feed-out d;

vice and to cut off the heat of the furnace thereform, I further movable baffle 16 w 'ch slides through a transverse slot in the roof ofthe forehearth, and may be raised and lowered by a suit able connecting rope or chain.

In using the apparatus the parts are held in the position shown in Fig. 1 until it is desired to draw glass into the rece tacle. The rods are then inserted in the en holes of the ate and it is priedup to allow the glass to ow through the slot in the dam and down through the trough into the receptacle. When the roper amount of glass has been delivered the gate is forced down, and its vshaped edge entering the notch in the dam gill cut off the glass and prevent further ow. may not be employed, though I prefer to use it, as giving a better seal.

Many variations may be made in the form and arrangement of the furnace, forehearth, trough, and gate device, without departing from my invention.

I claim:

1. In a glass feed-out device, a melting furnace having a forehearth with a discharge opening in its wall, a refractory valve block for controlling the said opening, a cross-wall having an opening therethrough, an inclined trough supported in said opening, and means for confining the heat from the forehearth in the chamber around the trough formed by the cross wall; substantially as described. k2, In aglass feed-out device, a dam formed rovide the vertically This interfitting of the gate and dam with a port extending below the level of the bath, a refractory valve for said port, and

- as described.

4. In a glass feed-out device, a wall having a dam with an opening above it, and aport extending below the level of the bath, and a refractory valve for controlling said port, said valve having a reduced or beveled owe'r edge arranged to seat in a V-shaped recess of the dam; substantially as described.

5. In a glass feed-out device, a forehearth having an opening in its front wall, an inclined trough with which the opening communicates, a refractory valve for controlling 6. In a glass feed-out device, a wall having a slot extending below the level of the bath, a vertically movable refractory gate therefor, a trough leading from the slot, and

trough and the wall; substantially as described.

7. In a glass feed-out device, a wall having a dam with an opening above it, and a receptacle, a trough leading from the port to the receptacle, and means for shutting off the substantially as describet nace having a forehearth, a feed-out device at the end of the forehearth, and a baffle arranged to cut off the heat from the feed-out device; substantially as described.

having an opening in its front wall, a trough leading from the opening, and a water-cooling pipe which extends under the joint between the trough and Wall, said pipe having retrouglg substantially as described. 'Iii testimony whereof, I have hereunto set Iny hand.

JOHN H. LUBBERS.

Witnesses: W H. M; CORWIN, I

JOHN MILLER.

heat oftheg-lassahath from the receptacle if a cooling device for the joint between the 5 port extending below the level of the bath, a 0

8. In a glass feed-out device, a tank fur- 45 9. In a glass feed-out device, a forehearth 5o versely bent portions at each side of the 55 

